gaganvmware wrote:
this mac belongs to window vm that has to be migrated between esx servers in cluster and this mac vm was migrated 7 times on 5/13 .
is this a big deal ? is this normal .. right ?
If you know that the VM with the actual MAC address was in fact moved by DRS / vMotion several times that day and you know the two switch ports mentioned in the log is connected to the two ESXi hosts then everything is perfectly normal.
It might seem a bit unusual for the physical switch that a MAC address changes location several times during the day, but it is nothing more "strange" than a user walking around a large office and connecting to the physical network at different locations, sends some packets, and then disconnect and later connect at some other physical position in the network. The switches should have no problem with that fact.
The only important is that the MAC address must never be learned from different locations at the same time. That would mean you have a network layer two loop, which is very dangerous.
In your situation I would say you can safely ignore the switch error log.